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!            ||            || colspan=5 | categories  
!            ||            || colspan=5 | categories  
|-
|-
! fx() name  || description || escaping || int output || encryption || formatting || output
! fx() name  || description || escaping || return format || encryption || formatting || output
|-
{{!-!}} <code>addcslashes()</code>  || Quote string with slashes in a C style || Y || string
| addcslashes || Quote string with slashes in a C style || Y
{{!-!}} <code>addslashes()</code>    || Quote string with slashes || Y || string
|-
{{!-!}} ''<code>chop()</code>''     || Alias of rtrim
| addslashes || Quote string with slashes || Y
{{!-!}} <code>count_chars()</code>  || Return information about characters used in a string || || int
|-
{{!-!}} <code>crc32()</code>        || Calculates the crc32 polynomial of a string || || int || Y
| ''chop''   || Alias of rtrim
{{!-!}} <code>crypt()</code>        || one-way string hashing || || || Y
|-
{{!-!}} [https://www.php.net/manual/en/function.escapeshellarg.php <code>escapeshellarg()</code>] || Escape a string to be used as a shell argument || Y.
| count_chars || Return information about characters used in a string || || Y
{{!-!}} [https://www.php.net/manual/en/function.escapeshellcmd.php <code>escapeshellcmd()</code>] || Escape any execution-invoking characters. || Y
|-
{{!-!}} <code>fprintf()</code>       || Write a formatted string to a stream || || || Y || || stream
| crc32       || Calculates the crc32 polynomial of a string || || Y || Y
{{!-!}} <code>localeconv()</code>   || Get numeric formatting information
|-
{{!-!}} <code>ltrim()</code>         || Strip whitespace (or other characters) from the beginning of a string
| crypt       || One-way string hashing || || || Y
{{!-!}} <code>md5_file()</code>     || Calculates the md5 hash of a given file
|-
{{!-!}} <code>md5()</code>           || Calculate the md5 hash of a string
| fprintf      || Write a formatted string to a stream || || || Y || stream
{{!-!}} <code>money_format()</code> || Formats a number as a currency string
|-
{{!-!}} <code>nl2br()</code>         || Inserts HTML line breaks before all newlines in a string
| localeconv    || Get numeric formatting information
{{!-!}} <code>number_format()</code> || Format a number with grouped thousands
|-
{{!-!}} <code>ord()</code>           || Convert the first byte of a string to a value between 0 and 255
| ltrim        || Strip whitespace (or other characters) from the beginning of a string
{{!-!}} <code>parse_str()</code>     || Parses the string into variables
|-
{{!-!}} <code>print()</code>        || Output a string
| md5_file      || Calculates the md5 hash of a given file
{{!-!}} <code>printf()</code>|| Output a formatted string
|-
{{!-!}} <code>quoted_printable_decode()</code>   || Convert a quoted-printable string to an 8 bit string
| md5          || Calculate the md5 hash of a string
{{!-!}} <code>quoted_printable_encode()</code>   || Convert a 8 bit string to a quoted-printable string
|-
{{!-!}} <code>quotemeta()</code>      || Quote meta characters
| money_format  || Formats a number as a currency string
{{!-!}} <code>rtrim()</code>          || Strip whitespace (or other characters) from the end of a string
|-
{{!-!}} <code>setlocale()</code>      || Set locale information
| nl2br        || Inserts HTML line breaks before all newlines in a string
{{!-!}} <code>sha1_file()</code>      || Calculate the sha1 hash of a file
|-
{{!-!}} <code>sha1()</code>            || Calculate the sha1 hash of a string
| number_format || Format a number with grouped thousands
{{!-!}} <code>similar_text()</code>    || Calculate the similarity between two strings
|-
{{!-!}} <code>soundex()</code>        || Calculate the soundex key of a string
| ord          || Convert the first byte of a string to a value between 0 and 255
{{!-!}} <code>sprintf()</code>        || Return a formatted string
|-
{{!-!}} <code>sscanf()</code>          || Parses input from a string according to a format
| parse_str    || Parses the string into variables
{{!-!}} <code>str_contains()</code>    || Determine if a string contains a given substring
|-
{{!-!}} <code>str_ends_with()</code>  || Checks if a string ends with a given substring
| print         || Output a string
{{!-!}} <code>str_getcsv()</code>      || Parse a CSV string into an array
|-
{{!-!}} <code>str_ireplace()</code>    || Case-insensitive version of str_replace
| printf       || Output a formatted string
{{!-!}} <code>str_pad()</code>        || Pad a string to a certain length with another string
|-
{{!-!}} <code>str_repeat()</code>      || Repeat a string
| quoted_printable_decode  || Convert a quoted-printable string to an 8 bit string
{{!-!}} <code>str_replace()</code>    || Replace all occurrences of the search string with the replacement string.
|-
{{!-!}} <code>str_rot13()</code>      || Perform the rot13 transform on a string.
| quoted_printable_encode  || Convert a 8 bit string to a quoted-printable string
{{!-!}} <code>str_shuffle()</code>    || Randomly shuffle a string.
|-
{{!-!}} <code>str_split()</code>      || Convert a string to an array.
| quotemeta     || Quote meta characters
{{!-!}} <code>str_starts_with()</code> || Checks if a string starts with a given substring
|-
{{!-!}} <code>str_word_count()</code>  || Return information about words used in a string.
| rtrim         || Strip whitespace (or other characters) from the end of a string
{{!-!}} <code>strcasecmp()</code>      || Binary safe case-insensitive string comparison
|-
{{!-!}} ''<code>strchr()</code>''     || alias of strstr
| setlocale     || Set locale information
{{!-!}} <code>strcmp()</code>          || binary-safe string comparison
|-
{{!-!}} <code>strcoll()</code>        || locale-based string comparison
| sha1_file     || Calculate the sha1 hash of a file
{{!-!}} <code>strcspn()</code>        || Find length of initial segment that does ''not'' match a mask (opposite of <code>strspn()</code>).
|-
{{!-!}} <code>strip_tags()</code>      || Strip HTML and PHP tags from a string.
| sha1 || Calculate the sha1 hash of a string
{{!-!}} <code>stripcslashes()</code>  || Un-quote string quoted with <code>addcslashes()</code>
|-
{{!-!}} <code>stripos()</code>        || Find the position of the first occurrence of a case-insensitive substring in a string.
| similar_text || Calculate the similarity between two strings
{{!-!}} [https://www.php.net/manual/en/function.stripslashes.php <code>stripslashes()</code>] || Un-quotes a quoted string
|-
{{!-!}} <code>stristr()</code>        || Case-insensitive <code>strstr()</code>
| soundex || Calculate the soundex key of a string
{{!-!}} <code>strlen()</code>          || Get string length. || || int
|-
{{!-!}} <code>strnatcasecmp()</code>  || case-insensitive string comparisons using a "natural order" algorithm
| sprintf || Return a formatted string
{{!-!}} <code>strnatcmp()</code>      || string comparisons using a "natural order" algorithm
|-
{{!-!}} <code>strncasecmp()</code>    || binary-safe case-insensitive string comparison of the first n characters
| sscanf || Parses input from a string according to a format
{{!-!}} <code>strncmp()</code>        || binary-safe string comparison of the first n characters
|-
{{!-!}} <code>strpbrk()</code>        || Search a string for any of a set of characters.
| str_contains || Determine if a string contains a given substring
{{!-!}} <code>strpos()</code>          || Find the position of the first occurrence of a substring in a string.
|-
{{!-!}} <code>strrchr()</code>        || Find the last occurrence of a character in a string.
| str_ends_with || Checks if a string ends with a given substring
{{!-!}} <code>strrev()</code>          || Reverse a string.
|-
{{!-!}} <code>strripos()</code>        || Find the position of the last occurrence of a case-insensitive substring in a string.
| str_getcsv || Parse a CSV string into an array
{{!-!}} <code>strrpos()</code>        || Find the position of the last occurrence of a substring in a string.
|-
{{!-!}} <code>strspn()</code>          || Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask (opposite of <code>strcspn()</code>).
| str_ireplace || Case-insensitive version of str_replace
{{!-!}} <code>strstr()</code>          || Find the first occurrence of a string in another string.
|-
{{!-!}} <code>strtok()</code>          || Tokenize string
| str_pad || Pad a string to a certain length with another string
{{!-!}} <code>strtolower()</code>      || Make a string lowercase.
|-
{{!-!}} <code>strtoupper()</code>      || Make a string uppercase.
| str_repeat || Repeat a string
{{!-!}} <code>strtr()</code>          || Translate characters or replace substrings
|-
{{!-!}} <code>substr_compare()</code>  || Binary safe comparison of two strings from an offset, up to length characters
| str_replace || Replace all occurrences of the search string with the replacement string
{{!-!}} <code>substr_count()</code>    || Count the number of substring occurrences
|-
{{!-!}} <code>substr_replace()</code>  || Replace text within a portion of a string
| str_rot13 || Perform the rot13 transform on a string
{{!-!}} <code>substr()</code>          || Return part of a string
|-
{{!-!}} <code>trim()</code>            || Strip whitespace (or other characters) from the beginning and end of a string
| str_shuffle || Randomly shuffles a string
{{!-!}} <code>ucfirst()</code>        || Make a string's first character uppercase
|-
{{!-!}} <code>ucwords()</code>        || Uppercase the first character of each word in a string
| str_split || Convert a string to an array
{{!-!}} <code>utf8_decode()</code>    || Converts a string from UTF-8 to ISO-8859-1, replacing invalid or unrepresentable characters
|-
{{!-!}} <code>utf8_encode()</code>    || Converts a string from ISO-8859-1 to UTF-8
| str_starts_with || Checks if a string starts with a given substring
{{!-!}} <code>vfprintf()</code>        || Write a formatted string to a stream.
|-
{{!-!}} <code>vprintf()</code>        || Output a formatted string
| str_word_count || Return information about words used in a string
{{!-!}} <code>vsprintf()</code>        || Return a formatted string
|-
{{!-!}} <code>wordwrap()</code>        || Wrap a string to a given number of characters.
| strcasecmp || Binary safe case-insensitive string comparison
|-
| ''strchr'' || Alias of strstr
|-
| strcmp || Binary safe string comparison
|-
| strcoll || Locale based string comparison
|-
| strcspn || Find length of initial segment not matching mask
|-
| strip_tags || Strip HTML and PHP tags from a string
|-
| stripcslashes || Un-quote string quoted with addcslashes
|-
| stripos || Find the position of the first occurrence of a case-insensitive substring in a string
|-
| stripslashes || Un-quotes a quoted string
|-
| stristr || Case-insensitive strstr
|-
| strlen || Get string length
|-
| strnatcasecmp || Case insensitive string comparisons using a "natural order" algorithm
|-
| strnatcmp || String comparisons using a "natural order" algorithm
|-
| strncasecmp || Binary safe case-insensitive string comparison of the first n characters
|-
| strncmp || Binary safe string comparison of the first n characters
|-
| strpbrk || Search a string for any of a set of characters
|-
| strpos || Find the position of the first occurrence of a substring in a string
|-
| strrchr || Find the last occurrence of a character in a string
|-
| strrev || Reverse a string
|-
| strripos || Find the position of the last occurrence of a case-insensitive substring in a string
|-
| strrpos || Find the position of the last occurrence of a substring in a string
|-
| strspn || Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask
|-
| strstr || Find the first occurrence of a string
|-
| strtok || Tokenize string
|-
| strtolower || Make a string lowercase
|-
| strtoupper || Make a string uppercase
|-
| strtr || Translate characters or replace substrings
|-
| substr_compare || Binary safe comparison of two strings from an offset, up to length characters
|-
| substr_count || Count the number of substring occurrences
|-
| substr_replace || Replace text within a portion of a string
|-
| substr || Return part of a string
|-
| trim || Strip whitespace (or other characters) from the beginning and end of a string
|-
| ucfirst || Make a string's first character uppercase
|-
| ucwords || Uppercase the first character of each word in a string
|-
| utf8_decode || Converts a string from UTF-8 to ISO-8859-1, replacing invalid or unrepresentable characters
|-
| utf8_encode || Converts a string from ISO-8859-1 to UTF-8
|-
| vfprintf || Write a formatted string to a stream
|-
| vprintf || Output a formatted string
|-
| vsprintf || Return a formatted string
|-
| wordwrap || Wraps a string to a given number of characters
|}
|}
==Splitting/Joining==
==Splitting/Joining==

Revision as of 18:54, 5 January 2026

The official PHP docs don't really organize the string-functions listing very well.

Main Functions

categories
fx() name description escaping return format encryption formatting output
addcslashes() Quote string with slashes in a C style Y string
addslashes() Quote string with slashes Y string
chop() Alias of rtrim
count_chars() Return information about characters used in a string int
crc32() Calculates the crc32 polynomial of a string int Y
crypt() one-way string hashing Y
escapeshellarg() Escape a string to be used as a shell argument Y.
escapeshellcmd() Escape any execution-invoking characters. Y
fprintf() Write a formatted string to a stream Y stream
localeconv() Get numeric formatting information
ltrim() Strip whitespace (or other characters) from the beginning of a string
md5_file() Calculates the md5 hash of a given file
md5() Calculate the md5 hash of a string
money_format() Formats a number as a currency string
nl2br() Inserts HTML line breaks before all newlines in a string
number_format() Format a number with grouped thousands
ord() Convert the first byte of a string to a value between 0 and 255
parse_str() Parses the string into variables
print() Output a string
printf() Output a formatted string
quoted_printable_decode() Convert a quoted-printable string to an 8 bit string
quoted_printable_encode() Convert a 8 bit string to a quoted-printable string
quotemeta() Quote meta characters
rtrim() Strip whitespace (or other characters) from the end of a string
setlocale() Set locale information
sha1_file() Calculate the sha1 hash of a file
sha1() Calculate the sha1 hash of a string
similar_text() Calculate the similarity between two strings
soundex() Calculate the soundex key of a string
sprintf() Return a formatted string
sscanf() Parses input from a string according to a format
str_contains() Determine if a string contains a given substring
str_ends_with() Checks if a string ends with a given substring
str_getcsv() Parse a CSV string into an array
str_ireplace() Case-insensitive version of str_replace
str_pad() Pad a string to a certain length with another string
str_repeat() Repeat a string
str_replace() Replace all occurrences of the search string with the replacement string.
str_rot13() Perform the rot13 transform on a string.
str_shuffle() Randomly shuffle a string.
str_split() Convert a string to an array.
str_starts_with() Checks if a string starts with a given substring
str_word_count() Return information about words used in a string.
strcasecmp() Binary safe case-insensitive string comparison
strchr() alias of strstr
strcmp() binary-safe string comparison
strcoll() locale-based string comparison
strcspn() Find length of initial segment that does not match a mask (opposite of strspn()).
strip_tags() Strip HTML and PHP tags from a string.
stripcslashes() Un-quote string quoted with addcslashes()
stripos() Find the position of the first occurrence of a case-insensitive substring in a string.
stripslashes() Un-quotes a quoted string
stristr() Case-insensitive strstr()
strlen() Get string length. int
strnatcasecmp() case-insensitive string comparisons using a "natural order" algorithm
strnatcmp() string comparisons using a "natural order" algorithm
strncasecmp() binary-safe case-insensitive string comparison of the first n characters
strncmp() binary-safe string comparison of the first n characters
strpbrk() Search a string for any of a set of characters.
strpos() Find the position of the first occurrence of a substring in a string.
strrchr() Find the last occurrence of a character in a string.
strrev() Reverse a string.
strripos() Find the position of the last occurrence of a case-insensitive substring in a string.
strrpos() Find the position of the last occurrence of a substring in a string.
strspn() Finds the length of the initial segment of a string consisting entirely of characters contained within a given mask (opposite of strcspn()).
strstr() Find the first occurrence of a string in another string.
strtok() Tokenize string
strtolower() Make a string lowercase.
strtoupper() Make a string uppercase.
strtr() Translate characters or replace substrings
substr_compare() Binary safe comparison of two strings from an offset, up to length characters
substr_count() Count the number of substring occurrences
substr_replace() Replace text within a portion of a string
substr() Return part of a string
trim() Strip whitespace (or other characters) from the beginning and end of a string
ucfirst() Make a string's first character uppercase
ucwords() Uppercase the first character of each word in a string
utf8_decode() Converts a string from UTF-8 to ISO-8859-1, replacing invalid or unrepresentable characters
utf8_encode() Converts a string from ISO-8859-1 to UTF-8
vfprintf() Write a formatted string to a stream.
vprintf() Output a formatted string
vsprintf() Return a formatted string
wordwrap() Wrap a string to a given number of characters.

Splitting/Joining

fx() name description
chunk_split Split a string into smaller chunks
explode Split a string by a string
implode Join array elements with a string
join Alias of implode

Single Character

fx() name description category
chr() Generate a single-byte string from a number conversion
lcfirst() Make a string's first character lowercase conversion
ctype_alnum() Check for alphanumeric character(s) ctype
ctype_alpha() Check for alphabetic character(s) ctype
ctype_cntrl() Check for control character(s) ctype
ctype_digit() Check for numeric character(s) ctype
ctype_graph() Check for any printable character(s) except space ctype
ctype_lower() Check for lowercase character(s) ctype
ctype_print() Check for printable character(s) ctype
ctype_punct() Check for any printable character which is not whitespace or an alphanumeric character ctype
ctype_space() Check for whitespace character(s) ctype
ctype_upper() Check for uppercase character(s) ctype
ctype_xdigit() Check for character(s) representing a hexadecimal digit ctype

Fuzzy

fx() name description
levenshtein Calculate Levenshtein distance between two strings
metaphone Calculate the metaphone key of a string

Conversion

fx() name description conversion format
bin2hex Convert binary data into hexadecimal representation hexadecimal
convert_cyr_string Convert from one Cyrillic character set to another Cyrillic
convert_uudecode Decode a uuencoded string Template:L/wp
convert_uuencode Uuencode a string Template:L/wp
get_html_translation_table Returns the translation table used by htmlspecialchars and htmlentities HTML
hebrev Convert logical Hebrew text to visual text Hebrew
hebrevc Convert logical Hebrew text to visual text with newline conversion Hebrew
hex2bin Decodes a hexadecimally encoded binary string hexadecimal
html_entity_decode Convert HTML entities to their corresponding characters HTML
htmlentities Convert all applicable characters to HTML entities HTML
htmlspecialchars_decode Convert special HTML entities back to characters HTML
htmlspecialchars Convert special characters to HTML entities HTML
nl_langinfo — Query language and locale information locale
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